Friction hinge



Feb. 4, 1930. M. l. KAST 1,745,545

FRICTION HINGE Filed April 12. 1929 s Sheets-Sheet 1 INVENTOR.

' A TTORNE Y.

'Feb. 4, 1 930. M, I, KA T 1,745,545

FRICTION HINGE File pril 1929 3 Sheets-Sheet 2 Feb. 4, 1930. M. l. KAST I FRICTION HINGE Filed April 12, 1929 3 Sheets-Sheet 3 gwumtoo Miler I Jiast,

' 30 the line 22 of Fig. 3.

Patented Feb. 4, 1930 PATENT OFFICE MILLER VI. KAs'r, or HARRISBURG, PENNSYLVANIA FRICTION: HINGE Application and April 12,

y This invention relates to door hinges of the so-called friction type, in which friction means are provided for holding the door normally in any desired position between fully closed and fully open in either direction; and the object of the invention is to provide a friction hinge which may be used as a simple frictionless hinge when desired, which may be readily and conveniently adjusted to regulate i I the frictional resistance to movement of the 7 justrnent of the device to regulate its. frictional resistance without the necessity of removing covers or other parts.

The invention consists of the features of construction, combination and arrangement "2Q of parts, hereinafter fully described and claimed, reference being had to the accompanying drawings, in which s Fig. 1 is a View in elevation of'the lower j portion of a door showing the same mounted :25upon my improved friction hinge, the latter 2 being in section taken substantially on line 1-91 of Fig. 3. a "Fig. 2 is a verticallongitudinal section through the door and the friction hinge on Fig. 3 is a top 'planview of the friction hinge with the cover of its casing removed and showing in dotted lines the door in closed position.

T351 Fig. 4 1s aview slmilar to Flg. 3 showing the hinge as arrangedto hold the door open to a predetermined degree, a portion of the door appearing in dotted lines.

Fig. 5 is a perspective view of the friction 49" brake band and the brake levers.

, Fig. 6 is a vertical transverse section on the line 66of Fig. 2.; r.

' V Fig. 7 's a perspective view of one of the bearing nuts. V '45, Referring now more particularly to the drawings,1 designates the lower portion of a door, and 2 my improved'friction'hinge de- VICEL.

The friction hinge device 2 comprises a cas- 1mg 3 normally open at its top and having a 1929'. Serial No. 354,646.

cover 4 for closing the same, the casing or floor box being designed to be set in a floor so that the upper surface of the cover will lie flush with the floor, over which casing cover 4 is placed'ajwear strip or plate 5' of brass or other metal. I

Within the casing 3, adjacent one end thereof, is arranged a hinge or pivot pin 6, having a lower end portion 7 journaled in an opening 8 in the bottom of the casing 3, and having-an upper end portion 9 journaled in an opening 10 in the cover plate 4, said portion 9 of the pin 6 being provided with an angular or non-circular coupling lug or projection 11 fitting within a correspondingly shaped opening 12 in a door supporting bracket plate 13 mortised in and securedby screws or other suitablefastenings to the bottom edge of'the door 1. Thepin 6 has fixedly formed therewith or keyed or otherwise fixedly secured thereto a brake drum 14, of wood, metal or other suitable material. i

The drum 14 is adapted to be engaged by the friction brake lining 16 of a split resilient brake'band 17 ,the ends of which are respectively securedto the adjacent short ends or arms 18 of a pair of brake levers 19, pivotally mounted at 20 inthe casing, the'opposite or long arms 21 of which levers extend toward the end of the casing opposite that at which the pivot pin and brake drum are located. r o

{The outer or. free ends of the arms 21 of the levers 19 are formed with elliptical or otherelongated openings 22, adapting said arms to loosely embrace an adjusting shaft 23 provided with a centrally disposed milled adjusting wheel 24. The opposite ends of the shaft, or portions thereof on opposite sides ofthe wheel 24, are respectively right and left hand threaded, and such threaded portions or ends of theshaft engage threaded openings 25in bearingnut blocks 26 having flattened base portions 27 fitted to rest and slide upon the bottom wall of the casing 3 and to bear stably thereon. These nuts 26 'arerprovided with outer. concaved faces-28 arran ed to respectively bear against the inner aces of the apertured ends of'the lever arms 21, an that when the'shaft 23 is turned i in one direction the lever arms 21 will be forced apart to move the lever arms 18 inwardly or towards each other and thereby contract the resilient brake band 17 for an obvious purpose, and so that when the shaft 23 is turned in the opposite direction the lever arms 21wi11 move inwardly or towardeach other t nder the force of the "resilient brake band 17 which is automatically extensible. The ends of the shaft 23 may be arranged to abut against the side waIls-of the-oasing or be journaled therein 'soas to hold said; shaft from endwise movement, while the form of the openings 22 and the sliding arrange-1' ment of the bearing nut'blocks 26 in the c-asingpermit of the 'free'and easy adjust;- ment ofthe lever arms to regulate to any closed,- position against aeeidentaliclosure and until; proper force is exerted for an intended opening or closing movement, Hhe adjusting wheel 24"projeots upwardly through a slot-28i I in the easing-cover' i through which it is suflic iently exposed'to permit it to loe manip'ulated for regulating the" frictional binding action withoutfthenecessityoffremo'ving; the cover or otherwise disruptingfthe parts-of the friction hinge or other parts f: the door mounting. v v j he construetion and operation of the'im proved fri'ction-hinge will. be readily understood from the foregoing description'andits advantages, understood by those versed :in the art without a further and" extended description. Itisg of course, to'be understood that, 'while the structur-diselosed'is ,pre-

ferred, changes, falling :within the "scope of, the appended claims may be made without departing from the spirit or sacrificing any ofthe-adv'anta ges' of theinvention; -Havingthi1s fully I claim 1-. A frictionhihge for doors embodying described my invention,

band, a rightand left hand screw shaft for adjusting said levers, and means for turning said shaft. 7 '3. A friction hinge for doors embodying a casing,-a hinge pin for connection with the door journaled in said casing, a brake drum carried [1 tliepin, nuts within the casing, a resilient; raike ba'nd for} action on the drum, levers connected with the brake band and movable infone direction by the resiliency of the bandenuin the opposite direction by i 7 movement of said nuts, a right and left hand threaded shaft for moving the nuts, and means for turning1 the shaft.

' In testimony w ereofl aflix my desired degree the working pressure of the '7 IVKA S v i so its j lie a casing, a hinge pin for connection with the i door journaled in the casing, abrake drhm carried by the pin, a brake band for engagement with the drum,. levers for ontracting the band and permitting; expansion thereof,

and mansfor adjusting the levers t6 regailate the braking action. i

a "A'friction': hingefor doors-embodying it casing,- a hinge pin for: connection with the door journale'd in the" casing, a brake :drum

carried by v the hinge pin; a resili'ent brake band for engagement with the drum, pivoted levers mine ete =with the'ends: of the brake 

